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Student Number 953203033
Author Yu-chin Kao(高裕欽)
Author's Email Address No Public.
Statistics This thesis had been viewed 983 times. Download 6 times.
Department Mechanical Engineering
Year 2007
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Catalytic effects of oxide on hydrogen storage characteristic of hypoeutectic Mg-Ni alloy
Date of Defense 2008-06-23
Page Count 41
Keyword
  • absorption/desorption rate
  • hydrogen storage alloy
  • hypoeutectic Mg-Ni alloy
  • XRD
  • Abstract This research plans to utilize casting method to prepare hypoeutectic
    Mg-15Ni alloy, and then adds the oxide catalysts in hypoeutectic Mg-15Ni alloy by ball milled, studies the oxide catalysts to influence on hydrogen storage characteristic of hypoeutectic Mg-15Ni alloy.
      As-cast Mg-15Ni alloy is formed by Mg and Mg2Ni two phase by the
    X-rays diffraction analysis, its diffraction peaks after the ball milled are obviously broaden and weaken , and adds oxides by ball milled can also observe diffraction peak it has to be obviously broadener and weakener than As-cast Mg-15Ni alloy , in addition can find the faint oxide diffraction peak. At activation circulation, reveals addition oxide catalyst can take place to react with hydrogen promptly without activation for a long time , and effect of Cr2O3, Fe2O3 is obviously outstanding; and during pressure-composite-isothermal test at 250,300 ℃, reveals addition the oxide catalyst enhances the absorption /desorption capacity and increases hydriding/dehydriding rate for Mg-15Ni alloy, however adding the oxide catalyst enhances desorption rate and desorption ratio at 300 ℃, but a little effect for enhancing desorption rate at 250 ℃,show that addition the oxide catalyst can not improve desorption rate effectively at 250 ℃ .
    Table of Content 一、    前言與文獻回顧...................................1
    1.1   前言.............................................1
    1.2   儲氫合金發展簡介 ...............................2
      1.3   儲氫合金種類與介紹  ...........................3
      1.4   儲氫合金吸放氫原理概述...........................7
       1.4.1.動力學特性.......................................7
       1.4.2 熱力學特性.......................................9
    1.5   研究背景與目的..................................12
    二、    實驗步驟與方法..................................14
    2.1   製備MN(Mg-15Ni)合金流程.........................16
      2.2   球磨製備MN(Mg-15Ni)+5wt.% MexOy合金流程..........16
      2.3   X 光粉末繞射分析(X-Ray powder diffraction,XRD)...16
      2.4   雷射光粒徑分析儀................................16
      2.5   掃描式電子顯微鏡微結構觀察......................17
      2.6   儲放氫特性測試..................................17
    三、    結果與討論......................................18
      3.1   合金結構XRD分析................................18
    3.2   粒徑分析 .......................................19
      3.3   SEM分析.........................................20
      3.4   儲放氫特性分析..................................22
       3.4.1 活化測試........................................22
       3.4.2 吸放氫速率測試..................................25
      3.5   儲放氫後粒徑分析................................36
    四、    結論............................................37
    五、    未來研究與方向..................................38
    六、    參考文獻........................................39
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    Advisor
  • Sheng-long Lee(李勝隆)
  • Files
  • 953203033.pdf
  • disapprove authorization
    Date of Submission 2008-07-18

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